Saw-mill dog



J. MOTE.

SAW MILL DOG.

(Rolode!) Patented J an. 17, 18-82.

ll L'i rzawsesx fnvf ni or M 4 WW I do hereby declare the following tobe a full, I clear, and exact description of the invention,

UNITED STATES PATENT OFFICE;

JOHN MOTE, OF ANTWERP, OHIO.

SAW-MILL DOG. s I

SPECIFICATION forming. part of Letters Patent No. 252,496, dated January17, 1882.

Application filed September 5, 1881.

county of Paulding, in the State of Ohio,

have invented certain new and useful Improvementsin Dog Attachments forSaw-Mills; and

such as willenable others skilled in the art to which it app'ertains tomake and use the same, reference being had to'the accompanying drawings, and to letters of reference marked thereon, which form part of thisspecification.

My invention relates to dog attachments for sawmills.

The object and nature of the invention will.

' to, as will hereinafter be described. The frame A is made of anysuitable material, but preferably of iron, and is attached by bar A tothe head-block in any suitable manner. The inner bar, B, and outer bar,0, are provided with a box or sleeve, F, the'opening of which is largeenough to allow the box to be moved up or down upon thebars. This box ispro vided with hearings or rollers G G, which are free to turn upontheir seats, and have a squared opening, through which the square shaftE of dog E is inserted. This shaft may be of any desired length, but ispreferably made sufficiently long to allow the fang to be drawn over thebed a snfiicient distance to grasp a log of thelargest diameter. Theshalt is bent at rightangles near the fang end, as shown,so that whenthe dog has been turned upwardly the point of the fang will be upon thesame level as the elbow.

The object of (No model.)

of box F, is placed a hinder or cam, H, which turns with the shaft.Thistbinder is a cylinder, having a longitudinal slice or segmentremoved from its periphery to giveit a camlike'form, so that when therounded part is turnedtoward thebearing-bar the pressure will 5 5 begreater than when the flat face is opposite the bearing-bar B. A spring,6, is placed upon the inner side of one end of the sleeve Fand pressesagainst the rear side of bar B,and tends todrawthebinderagainstthebearing-bar. The pressure of this spring, however, is only enough tohold the flat face of binder H against the bearing-bar withoutinterfering with its up or down movement when worked by the operator. Ifit be desired to clamp the sleeve at any particular point, the roundedpart of the binder is turned against the bearing -face. This isaccomplished by depressing lever D, which is attached to shaft E bymeans of squared openings in its bifurcated arms. The operation is asfollows: Lever D is elevated 'to bring the flat face of binder Hopposite the bearing'bar, so that box or sleeveF could be elevated toallow the log to pass under, the dog. The dog is then adjusted to itsplace by moving shaft E! in rollers G until the rightpoint is reachedfor the insertion of the fang. The box is now lowered until the fang isnearly in contact with the log. Lever l) is depressed and turns therounded part of binder H against the bearing-face, and at the same timeforces the fang into the log. When the log has been sawed the lever iselevated, the fang is withdrawn, and the device ready for another log.

If desired, a second box F, carrying a horizontally-ad justable dog, Eand capable of being adjusted vertically, may be attached to the bottomof the frame.

In Fig. 3 a rack and mangled pinion are shown in lieu of thebearing-face and binder. The cogs in the pinion correspond to therou'hded part of the binder and the mangled part to the tint face. Theoperation of this device is similar to that shown in Fig. 1.

What I claim asinew is 1. The combination of a saw-dog with a boxarranged substantially as shown, a breaking attachmentfixed upon theshaft of the dog and in contaotwith a bearingbar, and a spring andprovided with a spring forholding the located between the box and rearof the bearbreaking attachment against a bearing-bar, 1'0 ing-bar, forshe Eaurposle set foartlth.1 d t substantially as described.

2. A saw- 0;; ocate upon e ower si e 0 I 5 a frame for grasping theunder side of a log, JOHN MOTE' in combination Witha second saw-doghaving Witnesses: a breaking attachment upon its shaft and R. S. MURPHY,mounted upon a box sliding upon said frame, H. W. SPRAGUE.

